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Subject: 1.4i head on 1.8i bl
Replies: 18 Views: 1105

slymast 11.04.10 - 09:05pm
I did a mp9 conversion on a 1.8i(vw golf cti) after it blew a head gasket. I used a velociti 1.4i head. It run well. But it pushes oil through the breather and dip stick lifts up with high revs. * +

slymast 11.04.10 - 09:10pm
There was nothing wrong with the bottom end. Den i managed to get my hands on a 1.8i mp9 head. It ran perfectly. * +

slymast 11.04.10 - 09:13pm
Only difference between the heads is the size of the inlet valves. Why did the 1.4i head do dat? * +

mixdup 11.04.10 - 09:51pm
no idea dude...bet xav will have an answer for u * +

d4dawg 12.04.10 - 12:32am
Maybe larger to let more air in to give quicker response time to make up for smaller cc, as they rev higher than larger cc engines, so guessing needs to breathe quicker * +

d4dawg 12.04.10 - 12:35am
And results in the oil breather hoses and dip stick being filled with this extra volume of back fed air, as larger valve means quicker/possibly larger volume of air in cylinder * +

slymast 12.04.10 - 07:29am
The 1.8i head hav bigger inlet vavles. The 1.4i is smaller. * +

slymast 12.04.10 - 07:53am
My understanding is the 1.8i has bigger valves bcoz it needs more air. * +

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